Bowflex is limited: forget what bateman said. I don't know if he gets paid for saying that but that is totally out of line *turns whining off*
Free weights gives you the best workout and you will never benefit the same with using bowflex. The only reason you don't get the same burn with free weights is that you are not using enough weights to do your exercises. try using 80 pounds and you'll see what I mean..goodluck